Heating-furnace.



No. 778,939. PATENTED JAN. 3, 1905.

N A. L. YATES. HEATING FURNACE.

APPLIOATION FILED APR. 28, 1904.

X/AZ' MX Q UNITED STATES Patented January 3, 1905.

PATENT OEETcE.

HEATING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 778,939, dated January 3, 1905. Application filed April 28, 1904. Serial No. 205,330.

To all whom it may concern: I

Beit known thatI,ABRAHAML.YATEs,acitizen of the United States, residing at Niagara Falls, in the county of Niagara and State of New York, have invented certain new and useful Improvements in Heating-Furnaces; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to furnaces for heating air; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a vertical section through the furnace. Fig. 2 is a plan view of the furnace. Fig. 3 is a partial vertical section similar to Fig. 1, but showing a modification.

A is the ash-receiver. B is the grate. C is the fire-box above the grate, and D is the firepot which forms the lower part of the [irebox. The fire-box is provided with a feedneck 0 at one side of the furnace, through which fuel is introduced into the fire-pot. This feed-neck is provided with a door a. All these parts are of any approved construction.

E is a smoke-neck which projects from the fire-box on the opposite side of the furnace from the feed-neck.

F is an upper radiator, arranged above the said feed-neck and smoke-neck, and G is a lower radiator, arranged below the said parts. These two radiators consist of annular chambers, and they surround the fire-box at differ ent levels, leaving air-spaces between them. The two radiators are connected together near the feed-neck by one or more passages. Two passages or connecting-pipes (Z are preferably provided and are arranged one on each side of the feed-neck and close adjacent to it.

The upper radiator is connected with the smoke-neck by a passage or opening f, and

the lower radiator is connected with the smoke-neck by a passage or opening g.

The radiators are provided with cleaningopenings H at various approved points, and these openings are provided with suitable covers or closures /L.

I is a valve or damper pivoted in the smokerate outlet-pipe.

neck. This valve consists of a plate which is pivoted at its middle part, and when it is in the position shown by full lines in Fig. 1 it places the fire-box in communication with the lower radiator and the upper radiator in communication with the outlet of the smoke-neck, which is connected to any suitable chimney.

The circulation of smoke is, as shown by the arrows, from the fire-box, through the opening 9, into the lower radiator, thence to the upper radiator, through the passages (Z, and from the upper radiator to the outlet of the smoke-neck by the opening f. When the valve is placed in the position shown by dotted lines, the circulation of smoke is in the reverse direction, and it passes from the firebox to the upper radiator first and thence to the lower radiator and outlet.

If desired, each radiator may have a sepa- This form of the device is illustrated in Fig. 3, in which 7' is the outletpipe of the upper radiator and 7c the outletpipe of the lower radiator. These outlet-pipes are provided with valves or dampers and It" for closing them.

M is a pipe provided with avalve or damper on, which may be provided to form a direct connection between the top part of the firebox and the outlet-pipe of the upper radiator.

N is an uptake-pipe for the smoke, connected to the two outlet-pipes.

The valve shown in Fig. 1 may be used in the form of the device shown in Fig. 3 to distribute the smoke in the smoke-neck, or two valves or sliding plates f and g may be provided for that purpose, each opening f and g having its own sliding plate.

What I claim is 1. In a furnace, the combination, with a fire-box provided with a smoke-neck at one side, of two radiators arranged one above and the other below the smoke-neck and connected with it, means for reversing the direction of the products of combustion from the smokeneck through the said radiators, and means for connecting the smoke-spaces of the said radiators on the other side of the fire-box from the said smoke-neck.

side, of two radiators arranged one above and the other below the smoke-neck and connected with it, a pivoted valve or plate arranged in the said smoke-neck and operating to reverse the direction of the products of combustion from the smoke-neck through the said radiators, and means for connecting the smokespaces of the said radiators on the other side of the fire-box from the said smoke-neck.

3. In a furnace, the combination, with a fire-box provided with a smoke-neck on one side and a feed-neck on the other side, of two radiators arranged one above and the other 

